Wireless Doorbell with 2 Remote Push Buttons and 1 Receiver , Waterproof, Dustproof for Office and Home

DESCRIPTION
55 European and American ringtones are optional
Users can flexibly increase or decrease receivers and transmitters according to their needs
The working distance can reach 300 meters in an open and barrier-free environment: long-distance remote control, stable signal, and no mutual interference.
Transmitter waterproof level: IP55, no fear of rain and dust
The volume can be adjusted in 5 levels, and can be adjusted freely between 0-110 decibels.
The unique silent do-not-disturb mode gives you a better living experience.
Operating temperature：-37 ℃ to +70℃ receiver battery：3 pcs AAA battery